| 摘要 |
The purpose of the present invention is to provide a composite plate of a zirconia sintered body and a fiber-reinforced plastic, which is lightweight and has excellent impact resistance and scratch resistance, while being suitable for use for cases of mobile electronic devices, watch components and the like. The present invention relates to a composite plate having a thickness of 2 mm or less, which is obtained by laminating and closely fixing a zirconia sintered body and a fiber-reinforced plastic with each other, and wherein: the thickness ratio of the zirconia sintered body to the fiber-reinforced plastic, namely (the thickness of the zirconia sintered body)/(the thickness of the fiber-reinforced plastic) is 0.01-1; and the apparent density of the composite plate is 4.3 g/cm3 or less. The present invention also relates to a composite plate having a thickness of 2 mm or less, which is obtained by laminating and closely fixing a zirconia sintered body and a fiber-reinforced plastic with each other, and wherein the maximum roughness depth of the surface of the zirconia sintered body is 50 μm or less per 1 cm2. |
